Decorative building block



FIG. 1. is a front view of the decorative building block;

FIG. 2 is a right hand end view, left hand end view being a mirror image thereof of the decorative building block;

FIG. 3 is a rear view of the decorative building block;

FIG. 4 is a top view of the decorative building block; and,

FIG. 5 is a bottom view of the decorative building block. 

The ornamental design for the decorative building block, as shown and described. 